Laminated protective wrap

ABSTRACT

A laminated protective wrap having a single-faced or double-faced hard outer layer and a shock absorbing inner layer adhered thereto, for protecting goods shipped on spools or coils. The absorbing inner layer may be rigidly adhered to or removably adhered to the hard outer layer. The laminated protective wrap can include transverse cuts through the hard outer layer to permit bending of the laminated protective wrap in order to facilitate wrapping large objects. The degree of shock absorption is easily adjusted by varying the thickness and/or material of the hard outer layer or the shock absorbing inner layer.

Cross-Reference to Related Applications

[0001] This application claims priority from provisional applicationnumber 60/217,764 filed Jul. 12, 2000.

BACKGROUND OF THE INVENTION

[0002] 1. Field of Invention

[0003] This invention relates to a protective wrap packing material, andmore particularly, to a laminated protective wrap having a hard outerlayer with a shock absorbing inner layer adhered thereto.

[0004] 2. Related Art

[0005] Modern continuous manufacturing techniques often produce productsthat are sold in lengths of hundreds if not thousands of feet. Theseproducts are often coiled or spooled then shipped great distances andfrequently are exported to customers overseas. Upon arrival, the enduser will uncoil or unwind the product from the spoil and process it fortheir particular application. Two major types of products shipped inthis manner are sheet metal coils and fiber optic communication cables.

[0006] In the sheet metal industry, metal coils are transported bytruck, by rail, or even by ship and are often handled many times duringtheir transport. During handling, the heavy coils are generally loadedand unloaded using a crane or fork-lift truck and frequently collidewith or brush against other coils or other objects. As a result, manycoils are often dented, damaging the outer layers of the coil. Beforeprocessing, customers are forced to remove the damaged portion of thecoil and discard it as scrap.

[0007] In the telecommunications industry, fiber optic cable is spooledin continuous lengths thousands of feet in length for use in extensivenetworks that span great distances. These spools are of considerableweight and difficult to handle without colliding with other spools orother objects and damaging the cable. If damaged during shipment, thatportion of the cable is removed by the customer and is generallyunusable due to the costly expense of splicing fiber optic cable.

[0008] In the past, corrugated plastic sheets have been used to wrapboth metal coils and fiber optic cable during shipments. Corrugatedplastic sheets are durable, versatile and superior to traditionalmaterials, such as cardboard, in many ways. However, corrugated plasticsheets have only hard surfaces, and therefore lack the necessarycushioning or energy absorbing ability required to adequately protectproducts during extended shipments. Typically, corrugated plastic sheetsare supplemented by a foam or cloth liner to provide additionalprotection in traditional packaging systems. However, using multipleseparate layers of material is difficult, costly, and time consuming.Therefore, what the art needs is a protective wrap that combines thehardness of corrugated plastic with the shock absorption of foam orcloth liners into a single sheet that can easily by adapted for use inwrapping around spoils.

SUMMARY OF THE INVENTION

[0009] This invention solves the problems encountered with conventionalwrapping methods by providing a laminated protective wrap that combinesa hard outer layer and a shock absorbing inner layer into a singlesheet.

[0010] An aspect of the invention is a laminated protective wrap,including a hard outer layer having a top surface, a bottom surface, alength, and a width; and a shock absorbing inner layer adhered to thebottom surface of the hard outer layer.

[0011] Another aspect of the invention is a method for packaging a coilhaving an outer surface, a first end, and a second end, including thesteps of: (1) wrapping a laminated protective wrap comprising a hardouter layer having a top surface, a bottom surface, a length, and awidth, and a shock absorbing inner layer adhered to the bottom surfaceof the hard outer layer, around the outer surface of the coil such thatthe shock absorbing inner layer is in physical contact with the outersurface of the coil, and (2) securing the first and second ends of thelaminated protective wrap.

[0012] Another aspect of the invention is a method for manufacturing alaminated protective wrap comprising a hard outer layer having a topsurface, a bottom surface, a length, and a width; and a shock absorbinginner layer adhered to the bottom surface of the hard outer layer,including the steps of: (1) applying an adhesive to the bottom surfaceof the hard outer layer, and (2) affixing the shock absorbing innerlayer to the bottom surface of the impact resistant layer.

[0013] A feature of the invention is a laminated protective wrapproduced in a single sheet that has the strength and durability ofcorrugated plastic combined with the shock absorption of foam.

[0014] Another feature of the invention is that both single-faced anddouble-faced corrugated sheets can be used thereby allowing for a widevariety of strength characteristics.

[0015] Another feature of the invention is that the degree of shockabsorption can be easily adjusted by varying the thickness and/ormaterial of the shock absorbing inner layer.

[0016] An advantage of the invention is that it provides a protectivewrap with greater impact resistance and shock absorption therebypreventing damage to goods during extended shipments and rough handlingresulting in less waste.

[0017] Another advantage of the invention is that it provides increasedultraviolet protection.

[0018] Another advantage of the invention is that it makes wrapping alarge object, such as a metal coil, easier and less time consuming.

BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention is described with reference to theaccompanying drawings. In the drawings, like reference numbers indicateidentical or functionally similar elements. Additionally, the left-mostdigit(s) of a reference number identifies the drawing in which thereference number first appears.

[0020]FIG. 1A is a planar cross-sectional view of a single-facedlaminated protective wrap.

[0021]FIG. 1B is a perspective view of the single-faced laminatedprotective wrap.

[0022]FIG. 2 is a planar cross-sectional view of a double-facedlaminated protective wrap having a fluted middle surface.

[0023]FIG. 3 is a planar cross-sectional view of a double-facedlaminated protective wrap having a middle surface with vertical ribsrunning the length of the hard outer layer.

[0024]FIG. 4 is a perspective view of a plurality of transverse cutsthrough a double-faced laminated protective wrap.

[0025]FIG. 5 is a planar top view of a plurality of transverse cutsthrough the hard outer layer of a double-faced laminated protectivewrap.

[0026]FIG. 6 is a planar side view of a double-faced laminatedprotective wrap being wrapped around a product with a curved surface.

[0027]FIG. 7 is a planar side view of a metal coil packaged withlaminated protective wrap.

[0028]FIG. 8 is a perspective view of a metal coil wrapped withlaminated protective wrap.

[0029]FIG. 9 is a front view of a metal coil with caps made of laminatedprotective wrap over the ends of the metal coil.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0030] An embodiment of the laminated protective wrap 100 of the presentinvention is shown in FIGS. 1A and 1B. The laminated protective wrap 100is a rectangular sheet having a length 110 and a width 108 and includesa hard outer layer 101 with a shock absorbing inner layer 102 adheredthereto. The laminated protective wrap 100 includes a means for adhering103 the shock absorbing layer 102 to the hard outer layer 101.

[0031] The hard outer layer 101 has a top surface 104 and a bottomsurface 105. The shock absorbing inner layer 102 is preferably adheredto the bottom surface 105 of the hard outer layer 101, such that uponwrapping an object with the laminated protective wrap 100, the shockabsorbing inner layer 102 is in physical contact with the object and thetop surface 104 of the hard outer layer 101 is exposed to theenvironment.

[0032] The hard outer layer 101 is preferably a corrugated sheet ofplastic, but can alternatively be made of other materials such as metal,wood, cardboard, or a composite material. Non-limiting examples ofplastic that can be used for the hard outer layer 101 include:polyethylene (high-density and low-density), polyvinyl chloride,polypropylene, polystyrene, polyethylene terephthalate, acrylonitrilebutadiene styrene, polymethyl methacrylate, polyamide, polyurethane,phenolics, melamine-formaldehyde, urea-formaldehyde, unsaturatedpolyesters, epoxy, and reinforced plastics.

[0033] The hard outer layer 101 depicted in FIGS. 1A and 1B issingle-faced, meaning that it has a flat top surface 104 and a flutedbottom surface 105. The fluted bottom surface 105 includes one or moreelongated tubes 106 adjacently joined and extending the width 108 of thehard outer layer 101.

[0034] Attached to the bottom surface 105 of the hard outer layer 101,is the shock absorbing inner layer 102. The shock absorbing inner layer102 is the innermost layer of the laminated protective wrap 100. Theshock absorbing inner layer 102 acts as a cushion between the object tobe protected and the hard outer layer 101. The shock absorbing layer 100is preferably made of a commercially available polyethylene foam, butcan alternatively be made of other cushioning substances or materialsuch as, but not limited to: natural rubber, synthetic rubber, variouscloth or fibrous materials, or any composite material that is capable ofcushioning.

[0035] The laminated protective wrap 100 includes a means for adhering103 the shock absorbing inner layer 102 to the hard outer layer 101. Inthe preferred embodiment, the preferred means for adhering 103 is anadhesive, specifically a hot melt rubber based glue commerciallyavailable from National Starch & Chemicals, Adhesive number 34-2899.Alternatively, the shock absorbing inner layer 102 can be detachablyaffixed to the hard outer layer 101, for example by velcro, snaps,clips, or other mechanical fasteners, such that different shockabsorbing inner layers 102 can be combined with various hard outerlayers 101 depending on the desired qualities of the protective wrapneeded. For example, if the laminated protective wrap 100 had towithstand great stresses, a thick hard outer layer 101 may be combinedwith a thick shock absorbing inner layer 102. It would be readilyapparent to one of ordinary skill in the relevant art to use velcro,snaps, clips, or other mechanical fasteners to removably attach theshock absorbing inner layer 102 to the hard outer layer 101.

[0036]FIG. 2 shows an alternative embodiment of a laminated protectivewrap 200 in which the hard outer layer 201 is double-faced, meaning thatit has a flat top surface 202, a flat bottom surface 204, and a flutedmiddle surface 203. The fluted middle surface 203 includes one or moreelongated tubes 206 adjacently joined and extending the width 108 of thehard outer layer 201.

[0037]FIG. 3 shows another alternative embodiment of a laminatedprotective wrap 300 comprising a double-faced hard outer layer 301having a flat top surface 302, a flat bottom surface 304, and a middlesurface 303 having a plurality of I-beams or vertical ribs 306 runningthe width 108 of the hard outer layer 301. The angle, position andspacing of the vertical ribs 306 are shown in a uniform verticalarrangement for convenience purpose only. It would be readily apparentto one of ordinary skill in the relevant art to use a hard outer layer101 having vertical ribs 306 in a different arrangement employing avariety of angles, positions, and spaces between two adjacent verticalribs.

[0038] In general, double-faced laminated protective wraps 200, 300 arestronger and more rigid than single-faced laminated protective wraps100. Therefore, it is often desirable to include a means for bending ina double-faced laminated protective wrap 200, 300 to facilitate wrappinglarge objects. A single-faced hard outer layer 102 does not require anadditional means for bending because of the inherent bending qualitiesin such a hard outer layer 102, that does not have a middle surface 203or a flat bottom surface 204, when the bending radius is curved towardthe bottom surface 105.

[0039] An embodiment of the means for bending is depicted in FIGS. 4 and5 in relation to laminated protective wrap 300. The preferred means forbending is one or more transverse cuts 401 in the top surface 302 of thehard outer layer 301 extending along the width 402 of the laminatedprotective wrap 300, such that the transverse cuts 401 are perpendicularto the vertical ribs 306. The transverse cuts 401 are made using aconventional darting process known to one of ordinary skill in the art.Preferably, the transverse cuts 401 are uniformly spaced along the width402 of the laminated protective wrap 300 and are about 4 inches apart.The transverse cuts 401 extend the entire length 404 of the laminatedprotective wrap 300. Alternatively, one or more transverse cuts 401 canbe positioned at various distances or spaces along the width 402 as longas the desired effect of facilitating the bending of the laminatedprotective wrap 300 is retained.

[0040] The use of transverse cuts 401 is for convenience purpose only.It would be readily apparent to one of ordinary skill in the relevantart to employ a different means for bending in a double-faced laminatedprotective wrap 300. For example, alternative means for bending include,but are not limited to, each traverse cut 401 may be a single cutthrough the hard outer layer 301 or may comprise a plurality of cutsalong the same line through the hard outer layer 301, or each traversecut 401 may extend through the hard outer layer 301 or may be a creasein the hard outer layer 301 such that each transverse cut 401 onlyextends through the flat top surface 302 or the flat top surface 302 andmiddle surface 303 of the hard outer layer 301.

[0041] FIGS. 6-8 show the laminated protective wrap 300 in use. The useof the present invention is described in terms of laminated protectivewrap 300 for convenience purpose only. The disclosure is equallyapplicable to the alternative embodiments of the present invention. FIG.6 shows an embodiment of the laminated protective wrap 300 wrappedaround a curved surface 601, such as a large coil or spool. Thelaminated protective wrap 300 is wrapped around the curved surface 601such that the vertical ribs 306 are aligned with the perimeter, andcircumference, of the curved surface 601, resulting in the transversecuts 401 being perpendicular to the perimeter of the curved surface 601to facilitate the bending of the laminated protective wrap 300. Thelaminated protective wrap 300 bends at the transverse cuts 401 whenwrapped around the perimeter of the curved surface 601, thereby creatinga plurality of flat surfaces 602 that approximate the curved surface 601and allowing the shock absorbing inner layer 102 of the laminatedprotective wrap 300 to be in nearly continuous contact with the curvedsurface 601.

[0042]FIG. 7 shows a metal coil 701 packaged with a laminated protectivewrap 300. The metal coil 701 is packaged by wrapping the laminatedprotective wrap 300 around the outer surface of the coil 701 such thatthe shock absorbing inner layer 102 is in contact with the metal coil701 and the hard outer layer 301 is exposed to the environment. Thelaminated protective wrap 300 also has a first end 406 and a second end408 such that when the laminated protected wrap 300 is wrapped aroundthe outer surface of the coil 701, the first end 406 and the second end408 are in close proximity to each other. In one embodiment, the firstend 406 and the second end 408 are in contact with each other withoutoverlapping, whereas in an alternative embodiment, the first end 406 andthe second end 408 overlap to provide additional protection to the coil701. The first end 406 and the second end 408 of the laminatedprotective wrap 300 are then secured using adhesive tape or other meansknown to one of ordinary skill in the relevant art, e.g., one or morestraps, clips, or other mechanical fasteners.

[0043]FIG. 8 shows a laminated protective wrap 300 that has been securedafter wrapping a metal coil 701. The first end 406 and second end 408 ofthe laminated protective wrap 300 are secured in place with adhesivetape 808 or other means known to one of ordinary skill in the relevantart. The packaging is then completed by binding the laminated protectivewrap 300 in place with one or more strapping bands 802, 804 that runaround the ends of the metal coil 701. The use of adhesive tape 808 andstrapping bands 802, 804 is well known in the relevant arts.

[0044]FIG. 9 shows a metal coil 701 wrapped with a laminated protectivewrap 300, wherein the ends of the coil 701 are covered with caps 808,810 also made of laminated protective wrap 300. The caps 902, 904 areheld in place by one or more strapping bands 802, 804.

CONCLUSION

[0045] While various embodiments of the present invention have beendescribed above, it should be understood that they have been presentedby the way of example only, and not limitation. It will be understood bythose skilled in the art that various changes in form and details may bemade therein without departing from the spirit and scope of theinvention as defined. Thus, the breadth and scope of the presentinvention should not be limited by any of the above-described exemplaryembodiments, but should be defined in accordance with the followingclaims and their equivalents.

What is claimed is:
 1. A laminated protective wrap, comprising: a hard outer layer having a top surface, a bottom surface, a length, and a width; a shock absorbing inner layer adhered to said bottom surface of said hard outer layer; and a means for adhering said shock absorbing inner layer to said hard outer layer.
 2. The laminated protective wrap according to claim 1, wherein said hard outer layer is a corrugated sheet.
 3. The laminated protective wrap according to claim 2, wherein said corrugated sheet is single-faced having a top surface and a bottom surface.
 4. The laminated protective wrap according to claim 3, wherein said bottom surface of said hard outer layer comprises one or more elongated tubes adjacently joined and extending the width of said hard outer layer.
 5. The laminated protective wrap according to claim 2, wherein said corrugated sheet is double-faced having a top surface, a middle surface, and a bottom surface.
 6. The laminated protective wrap according to claim 5, wherein said top surface and said bottom surface of said hard outer layer are flat surfaces, and said middle surface comprises a plurality of elongated tubes adjacently joined and extending the width of said hard outer layer.
 7. The laminated protective wrap according to claim 5, wherein said middle surface of said hard outer layer comprises one or more vertical ribs extending the width of said hard outer layer.
 8. The laminated protective wrap according to claim 2, wherein said corrugated sheet is made of a material selected from the group consisting of plastic, wood, cardboard, and a composite material.
 9. The laminated protective wrap according to claim 1, wherein said shock absorbing inner layer is selected from the group consisting of foam, polyethylene foam, natural rubber, synthetic rubber, cloth material, fibrous material, and any composite material that is capable of cushioning.
 10. The laminated protective wrap according to claim 1, wherein said means for adhering is selected from the group consisting of an adhesive, velcro, snaps, clips, and fasteners.
 11. The laminated protective wrap according to claim 10, wherein said means for adhering is an adhesive that is a hot melt rubber-based glue.
 12. The laminated protective wrap according to claim 1, wherein said absorbing inner layer is removably detachable from said hard outer layer.
 13. The laminated protective wrap according to claim 5, further comprising a means for bending said laminated protective wrap.
 14. The laminated protective wrap according to claim 13, wherein said means for bending comprises one or more transverse cuts in said top surface of said double-faced corrugated sheet.
 15. The laminated protective wrap according to claim 14, wherein said one or more transverse cuts extend through said middle layer of said double-faced corrugated sheet.
 16. A method for packaging a curved surface having a perimeter, an outer surface, a first end, and a second end, comprising the steps of: a. wrapping a laminated protective wrap comprising a hard outer layer having a top surface and a bottom surface and a shock absorbing inner layer adhered to said bottom surface of said hard outer layer, around the perimeter of the outer surface of the curved surface such that said shock absorbing inner layer is in physical contact with the outer surface of the curved surface; and b. securing said laminated protective wrap around said curved surface.
 17. The method according to claim 16, wherein said means for securing of said step (b) is selected from the group consisting of tape, one or more straps, an adhesive, and fasteners.
 18. The method according to claim 16, further comprising the steps of: c. placing a first cap constructed of said laminated protective wrap over the first end of the curved surface; d. securing said first cap in place; e. placing a second cap constructed of said laminated protective wrap over the second end of the curved surface; and f. securing said second cap in place.
 19. The method according to claim 18, wherein said securing of said step (d) is selected from the group consisting of tape, one or more straps, an adhesive, and fasteners.
 20. The method according to claim 18, wherein said securing of said step (f) is selected from the group consisting of tape, one or more straps, an adhesive, and fasteners.
 21. The method according to claim 18, wherein said laminated protective wrap has a first end and a second end such that said first end and said second end are in close proximity to each other upon being wrapped around the curved surface.
 22. The method according to claim 18, wherein said laminated protective wrap has a first end and a second end such that said first end overlaps said second end upon being wrapped around the curved surface.
 23. A method for manufacturing a laminated protective wrap comprising a hard outer layer having a top surface and a bottom surface, and a shock absorbing inner layer, comprising the steps of: a. applying an adhesive to the bottom surface of the hard outer layer; and b. affixing the shock absorbing inner layer to the bottom surface of the hard outer layer. 